Решение задачи по физике раздел 29 пункт 71 механика

71. A crane lifts a weight of m = 3 m with acceleration a = 0.5 m / s2. Determine the average power of <N> for crane from time t1 = 4 s to t2 = 8, if the efficiency of the crane η = 40%.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)